They were one of the "Great Eight Families" (Daeseongpaljok, 大姓八族) of Baekje: (Sa (沙氏), Yeon (燕氏), Hyeop (劦氏), Hae (解氏), Jin (眞氏), Guk (國氏), Mok (木氏), and Baek (苩氏)).
The Sa clan promoted their influence by military force and produced a queen in the late reign of Mu of Baekje.
They did not lose their status as central nobles during the reign of the last King, Uija of Baekje by colluding with royal authority.
In the late Baekje all the Great Eight Families except for Sa and Guk clans lost their status as the central nobles and were degraded to local influence at last.
[4] The records of the Hae clan are sparse and broken making it hard to create a family tree but can be viewed as a timeline.